<template>
<div>
    <div class="box-a">
    </div>        
</div>  
</template>

<script>
export default {

}
</script>

<style scoped>
.box-a{
    width: 100px;
    height: 100px;
    background: orange;
    position: relative;
    animation: myframe 5s infinite;
}
@keyframes myframe{
    from {
        top: 0px;
    }
    to {
        top: 200px;
    }
}
</style>